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$477+ Cheap flights from Heathrow (LHR) to Philadelphia (PHL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
1 adult, Economy
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Find cheap flights from Heathrow to Philadelphia with Cheapflights

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Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or November, booked 12 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Heathrow to Philadelphia

Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:40 am -
2 stops23h 00m
Mon 9/219:25 am -
2 stops25h 35m
Deal found 8/10$798
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/162:10 pm -
2 stops24h 33m
Thu 9/247:30 pm -
1 stop10h 10m
Deal found 8/10$799
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/299:30 am -
2 stops19h 00m
Wed 10/711:20 am -
1 stop16h 10m
Deal found 8/6$801
This Air Canada deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:30 am -
1 stop10h 17m
Wed 10/2110:40 am -
2 stops17h 55m
Deal found 8/5$802
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:30 am -
2 stops15h 01m
Wed 9/2310:30 am -
2 stops15h 00m
Deal found 8/6$804
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:30 am -
1 stop13h 35m
Sun 9/137:40 pm -
2 stops20h 55m
Deal found 8/6$806
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:30 am -
1 stop13h 35m
Thu 10/2910:30 am -
2 stops16h 00m
Deal found 8/6$807
This Air Canada deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:05 pm -
2 stops24h 37m
Tue 10/610:05 am -
1 stop15h 25m
Deal found 8/5$808
This Air Canada deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 am -
2 stops19h 06m
Wed 10/2810:30 am -
2 stops16h 00m
Deal found 8/6$809
This Scandinavian Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:40 am -
2 stops20h 27m
Tue 10/279:20 am -
2 stops32h 20m
Deal found 8/10$812

Find flight deals from Heathrow to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$801
(United Airlines)

One-way from

$477
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$1,118

Good round-trip deal

$867 or less

Good one-way deal

$664 or less
Provider with most accurate pricing for London Heathrow-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-Philadelphia flights.
Search Deals
From London Heathrow to Philadelphia
Search Deals
One-way flight from London Heathrow to Philadelphia
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Philadelphia.
Search Deals
Price to beat on a one-way flight from London Heathrow to Philadelphia.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Heathrow to Philadelphia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Mon 11/2

11:10 am-11:30 pm

2 stops17h 20m

Philadelphia

Sat 11/28

9:15 am-9:00 pm

2 stops30h 45m

$826

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Wed 11/11

6:30 am-2:05 pm

1 stop12h 35m

Philadelphia

Wed 11/18

4:25 pm-7:00 am

1 stop9h 35m

$841

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Tue 11/10

7:05 am-10:12 pm

3 stops20h 07m

Philadelphia

Tue 11/17

12:25 pm-5:40 pm

2 stops24h 15m

$841
Quickest round-trip

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Mon 11/2

6:30 am-2:05 pm

1 stop12h 35m

Philadelphia

Mon 11/16

7:50 pm-7:50 am

Nonstop7h 00m

$844

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Fri 9/18

9:05 pm-9:39 pm

3 stops29h 34m

Philadelphia

Wed 9/23

9:25 am-9:20 am

2 stops18h 55m

$846

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Wed 11/11

7:05 am-12:55 am

3 stops22h 50m

Philadelphia

Wed 11/18

2:15 pm-9:40 pm

2 stops26h 25m

$850

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Mon 10/5

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Mon 10/12

3:08 pm-6:55 am

1 stop10h 47m

$855

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Fri 9/4

2:10 pm-9:43 am

2 stops24h 33m

Philadelphia

Fri 9/11

3:05 pm-10:25 am

2 stops14h 20m

$878

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Wed 9/2

8:40 am-8:01 pm

1 stop16h 21m

Philadelphia

Sun 9/6

9:12 am-6:30 am

1 stop16h 18m

$886
Cheapest one-way

LondonPhiladelphia

LHR London Heathrow - PHL Philadelphia

LHRPHL

London Heathrow

Tue 1/19

6:30 am-2:05 pm

1 stop12h 35m

$540

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Heathrow to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to Philadelphia in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London Heathrow Airport-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Heathrow to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Philadelphia

How far ahead should I book a flight from London Heathrow Airport to Philadelphia?

The best time to book flights from London Heathrow Airport to Philadelphia is 11 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $749). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of $1,118). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to PHL?

Find hourly flight availability from Heathrow to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 10, 2026.

When flying from London Heathrow Airport to Philadelphia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from London Heathrow Airport to Philadelphia?

Airfare is below average for this route at the moment.

London Heathrow Airport to Philadelphia flights typically cost between $952 and $1,235 in September.
The cheapest round-trip price found within the last 5 days was $801 on United Airlines (Sep 29-Oct 7).

The best insider tips for London Heathrow Airport to Philadelphia flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Philadelphia trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Philadelphia. Reviews last updated August 10, 2026.
Peruse reviews from past customers who have flown with Aer Lingus,American Airlines, andBritish Airways from London Heathrow Airport to Philadelphia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,693 reviews

Food

6.7

Crew

8.1

Overall

7.3

Boarding

7.5

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,693 reviews
Aer Lingus
7.3
Good
1,693 reviews

Food

6.7

Crew

8.1

Overall

7.3

Boarding

7.5

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
American Airlines
7.1
Good
11,904 reviews
Aer Lingus
7.3
Good
1,693 reviews

Food

6.7

Crew

8.1

Overall

7.3

Boarding

7.5

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
British Airways
6.7
Okay
8,155 reviews
Aer Lingus
7.3
Good
1,693 reviews

Food

6.7

Crew

8.1

Overall

7.3

Boarding

7.5

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Philadelphia from London Heathrow?

    Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 12 inbound flights from London Heathrow per day from 3 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.

  • How long is the flight from London Heathrow Airport to Philadelphia?

    Departing from London Heathrow Airport to Philadelphia will take you 12h 35m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?

    Flying on American Airlines is currently your cheapest option to Philadelphia, with prices starting at $610. Additional round-trip tickets that might be worth considering are offered by British Airways and Aer Lingus, with the lowest prices starting at $614 and $674, respectively. American Airlines is currently priced 30% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?

    To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at $479. American Airlines flights start at $490 while deals on Finnair start at $493 one-way.

  • What are the most reliable airlines from London Heathrow Airport to Philadelphia?

    Before booking your flight to Philadelphia from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: Malaysia Airlines (86%), American Airlines (82%), Finnair( 82%).

  • What are the cheapest flights from London Heathrow Airport to Philadelphia?

    Looking for the cheapest flight from London Heathrow Airport to Philadelphia? While on average our users pay $1,715, our data indicates the cheapest price to be $567. The most popular route (London Heathrow - Philadelphia), is priced around $687.

  • Can I find deals for flights from Heathrow to Philadelphia that include hotel bookings?

    Yes. In addition to deals on Heathrow to Philadelphia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Philadelphia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Philadelphia.

  • Can I find deals for business class flights from Heathrow to Philadelphia?

    Yes. Cheapflights offers flight deals from Heathrow to Philadelphia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of $749). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of $1,118). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Reading
Camden
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Heathrow to Philadelphia

Discover the top 3 airlines that operate flights from Heathrow to Philadelphia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$610Average$849FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$614Average$781FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$674Average$1,065FlexibilityNo cancel feeOn-timeN/A

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